Plastic article or earthenware shaping or treating: apparatus – Diverse distinct type shaping means – Shaping orifice and either a downstream preform reshaping...
Patent
1994-06-03
1996-06-04
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Diverse distinct type shaping means
Shaping orifice and either a downstream preform reshaping...
264286, 264508, 425336, 425396, B29C 3336, B29D 2318
Patent
active
055227180
ABSTRACT:
An apparatus for the production of corrugated tubing from thermoplastic synthetic resin including a shaping path following an extrusion head of an extruder and composed of a guide which is arranged in a frame and on which mold halves, fitted together in a pair at an inlet to define annular molds in a compact train as a travelling mold moving with the tube are advanced by at least one drive pinion arranged at an initial part of the shaping path, the pinion being in mesh with racks on the fitted together mold halves. At an exit point following the shaping path, the mold halves are separated from one another and are gripped by gripping arms provided with coupling devices and area shunted back to the inlet of the shaping path. The gripping arms are bearinged by drives in a movable fashion on carriages. The carriages are able to be reciprocated by drives on guides on return paths parallel to the shaping path. In order to simply control the operation of the gripping arms while having a simple and sturdy mechanical design the gripping arms are arranged to be moved in guides of such carriages in a direction which is exclusively transverse in relation to the path of movement of the carriages.
REFERENCES:
patent: 4212618 (1980-07-01), Hegler et al.
patent: 4365948 (1982-12-01), Chaplain
patent: 4787598 (1988-11-01), Rahn et al.
patent: 5372774 (1994-12-01), Lupke
Brochure of Deutsche Star GmbH "Das Linear-Programm"--Jun. 13, 1989.
Drossbach GmbH & Co. KG
Leyson Joseph
Woo Jay H.
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